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07-12-2008, 07:23 PM
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#1 |
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Stock
Join Date: Jul 2008
Location: Lincoln< NE
Posts: 3
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MBC how much PSI???
Hey I am new to this forum and new to tuning but all my friends have been for years and years but I want to learn on my own because everyone of my friends is different and drives different cars so i want to know what other supra drivers do not mazada and honda guys do... Any who my questions is i just got my boost gauge in and running fine. Now I want to put a MBC in which I just got in the mail. I understand how to install it but how much PSI should I run on a stock turbo with new down pipe, full 3in HKS cat back, H&K intake, hard charge pipe and Greddy type S BOV? Currently at 6.5 pounds. Heard of head gaskets going at 12-14 psi. So I was thinking 10psi. Will that be safe???
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B B B BOVVINNNN! |
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07-13-2008, 11:46 AM
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#2 |
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500whp yet?
Join Date: Jun 2005
Location: CT U.S.A.
Posts: 966
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it doesn't work that way ,
MBC = FCO try RTFM
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300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS Last edited by ddmcse; 07-13-2008 at 11:48 AM. |
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07-13-2008, 05:31 PM
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#3 |
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Stock
Join Date: Jul 2008
Location: Lincoln< NE
Posts: 3
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um again i am new to this wat is FCO and what does not work that way? I just want to know how much boost is safe with the mods i have.
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07-14-2008, 01:56 AM
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#4 |
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500whp yet?
Join Date: Nov 2005
Location: Mechanicsville, MD, US of A, 20659
Posts: 1,060
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fco = fuel cut off. its when the ecu kills kills ignition to protect the motor. i cant explain any better at the moment, maybe someone else can explain it a little better. basicly its when the motor reaches the peak of the fuel system and cant match the amount of air coming in, so it kills ignition to protect the motor. a mbc will likely make you hit fco, so just turn it down till you dont hit it. if you feel like turning up the boost more you will need to look into getting rid or around fuel cut
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88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat |
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07-14-2008, 02:11 PM
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#5 |
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Stock
Join Date: Jul 2008
Location: Lincoln< NE
Posts: 3
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got it so how do you get around the FCO is there an easy bolt on like the MBC and i just ordered brand new OBX plugs and wires will this help?
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07-19-2008, 11:01 PM
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#6 | |
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3" Exhaust
Join Date: May 2006
Location: So. Cal Mountains
Posts: 178
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Quote:
It's a pretty easy install. Plugs into your ECU. I have it, and an electronic boost controller. I believe however that the stock wastegate actuator can't handle boost pressures over 11 PSI or so. That's a problem I'm dealing with now. (Any suggestions out there??) I have also heard boosting over 12 PSI is risky to our engines. I have set boost at 12 PSI but it wont hold. Boosts very briefly to 12 then drops back down to about 8. Anyway, with what your doing this HKS FCD will help and at least boost you to 8 PSI. (At 8 PSI you shouldn't even need the PCD as that is the factory boost max level) If you want to boost higher get the FCD and I would HIGHLY recomend a metal head gasket with ARP head studs. If you don't do that now you will eventually (probably soon) blow your head gasket and then do it. We do need to find out what's up with this wastegate actuator. Maybe we need to by-pass it and go with an external blow off valve (BHV). Anybody, anybody????? |
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